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-rw-r--r--compiler/hsSyn/HsLit.hs2
1 files changed, 1 insertions, 1 deletions
diff --git a/compiler/hsSyn/HsLit.hs b/compiler/hsSyn/HsLit.hs
index 1044f9bca6..31c7a02d07 100644
--- a/compiler/hsSyn/HsLit.hs
+++ b/compiler/hsSyn/HsLit.hs
@@ -101,7 +101,7 @@ data HsOverLit p
ol_rebindable :: PostRn p Bool, -- Note [ol_rebindable]
ol_witness :: HsExpr p, -- Note [Overloaded literal witnesses]
ol_type :: PostTc p Type }
-deriving instance (DataId p, DataId p) => Data (HsOverLit p)
+deriving instance (DataId p) => Data (HsOverLit p)
-- Note [Literal source text] in BasicTypes for SourceText fields in
-- the following